KR101091666B1 - De-Mineralizer for fuel cell - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling water ion filter for a fuel cell vehicle, and more particularly to an ion filter for removing ions eluted from a pipe or the like in cooling water for cooling a fuel cell stack. In particular, the present invention is composed of a structure that can reduce the differential pressure caused by the ion resin layer, the cooling water can pass smoothly, thereby maximizing the ion filtering effect and at the same time maximize the use efficiency of the ion resin The purpose is to provide a structure. To achieve the above object, the housing having an inlet port and an outlet port; A filter member in which an ion opening is filled, an inlet through which an inlet port of the housing communicates with an inlet port of the housing, and a coolant passing through the ion resin is discharged in a radial direction from a side thereof; It is configured to include, but the flow chamber in communication with the outlet port of the housing is formed around the side of the filter member in the housing, the coolant is discharged radially through the outlet from the filter member outlet port in the flow chamber A cooling water ion filter for a fuel cell vehicle is disclosed.

Description

Coolant ion filter for fuel cell vehicle {De-Mineralizer for fuel cell}

The present invention relates to a coolant ion filter for a fuel cell vehicle, and more particularly, to an ion filter for removing ions eluted in the coolant of a fuel cell stack.

A fuel cell system applied to a hydrogen fuel cell vehicle, which is one of environmentally friendly future vehicles, includes a fuel cell stack for generating electric energy from an electrochemical reaction of a reaction gas, a hydrogen supply device for supplying hydrogen as fuel to the fuel cell stack, An air supply device that supplies air containing oxygen, which is an oxidant for electrochemical reaction, to the fuel cell stack, and releases heat, a byproduct of the electrochemical reaction of the fuel cell stack, to the outside to optimally control the operating temperature of the fuel cell stack and It consists of a heat and water management system that performs management functions.

In such a configuration, the fuel cell stack generates electrical energy from an electrochemical reaction of hydrogen and oxygen, which are reaction gases, and emits heat and water as the reaction byproducts. Accordingly, in the fuel cell system, an apparatus for cooling the stack is essential to prevent a temperature increase in the stack.

In general, in a vehicle fuel cell system, a cooling system for maintaining a fuel cell stack at an optimum temperature has been used to cool water by circulating water through cooling water channels in the stack.

The cooling system of such a fuel cell vehicle is shown in FIG. 1 is a schematic view showing a coolant loop of a fuel cell vehicle, in which a coolant does not pass through a coolant line 3 and a radiator 2 configured between a fuel cell stack 1 and a radiator 2 so that coolant can be circulated. And a three-way valve 5 for bypassing the pump, and a pump 6 for pumping the cooling water and pumping the cooling water through the cooling water line 3.

On the other hand, the pipes forming the coolant loop of the fuel cell system may be made of SUS 316L, Teflon, Al 3003, food grade silicon, etc. As very limited. SUS 304 cannot be used due to ion elution.

In the case of using an inexpensive material, impurities and ions are eluted into the coolant at the contact area of the coolant, and the eluted ions may cause serious problems in which electricity generated in the fuel cell stack flows through the coolant.

Furthermore, in fuel cell vehicles that operate while generating electricity while the driver and passengers are on board, if the ion conductivity of the coolant rises above a certain level due to component material problems, leakage along the coolant loop will occur. Electric current can be generated to disable the normal operation of the electric devices and moving parts installed in the vehicle, as well as to seriously affect the safety of the driver and passengers (risk of electric shock).

In order to solve this problem, the fuel cell vehicle always senses the conductivity of the coolant, and reflects the control logic that shuts down the system when the conductivity rises above a certain value.

In addition, in order to maintain the ion conductivity and the electrical conductivity of the cooling water below a certain level, an ion filter (De-Mineralizer, DMN) 7 is attached to the cooling water loop to maintain the ion conductivity of the cooling water below a certain level.

The ion filter 7 is a component that serves to lower the electrical conductivity of the cooling water to a predetermined level by filtering ions contained in the cooling water entering the fuel cell stack 1, Figure 2 is a perspective view showing a conventional ion filter 3 is a longitudinal cross-sectional view, and FIG. 4 is a view showing a differential pressure section (section filled with an ion resin) in a conventional ion filter.

The ion filter 100 is usually filled in the housing 110 through which the coolant passes, the port members (inlet and outlet ports) 120 and 130 for allowing the coolant to flow into and out of the housing 110, and the inside of the housing 110. (Iii) mesh assemblies 140a and 140b for supporting the ion resin 101 for filtering the ions contained in the cooling water and the ion resin 101 filled in the housing 110 and preventing leakage. It is configured to include.

In this configuration, the mesh assemblies 140a and 140b pass through the cooling water but keep the small granular ion resin 101 inside the housing 110, and the inlet port 120 and the outlet port at both ends of the housing 110. 130) is installed on both sides to prevent the leakage of the ion resin filled in the housing.

In the ion filter 100 configured as described above, the coolant introduced through the inlet port 120 (connected to the pump outlet end) at the bottom of the housing 110 is mesh assembly 140a, ion resin 101, and mesh assembly 140b. Passed through the outlet port 130 (connected to the pump inlet end) of the upper housing 110, the cooling water is filtered while passing through the ion resin 101 to remove the ions.

This removal of ions from the coolant prevents leakage of the stack current through the coolant, which in turn makes the vehicle's electrical safety compliant.

However, as shown in FIG. 3, the conventional ion filter 100 follows a longitudinal path between the inlet port 120, which is the lower port, and the outlet port 130, which is the upper port, and the ion resin ( A section filled with 101 is a section for generating a cooling water pressure difference (differential pressure) between the inlet side and the outlet side.

As a result, the cooling water passes through the longitudinal (axial) section of the ion resin, which causes the differential pressure section in the ion filter (the longitudinal section in which the ion resin is filled in FIG. 3, that is, the section between the upper and lower ends of the housing). Since this lengthens, the pressure difference between the pressure of the cooling water flowing through the inlet port and the cooling water discharged through the outlet port is largely generated.

5 is a graph showing an increase in the differential pressure according to the increase in the flow rate of the cooling water in the conventional ion filter, it can be seen that the differential pressure is greatly generated as the flow rate of the cooling water increases.

In addition, the conventional ion filter is mounted in a bypass loop instead of the main cooling water loop as shown in FIG. 1, and furthermore, since a high differential pressure is generated due to a long differential pressure section, smooth cooling water circulation is impossible. .

In particular, the problem that the coolant does not flow smoothly lowers the ion filtering efficiency of the coolant extremely, and thus the current does not solve the leakage current problem because the electric conductivity does not drop quickly at the initial start of the vehicle.

Therefore, the present invention has been invented to solve the above problems, it is composed of a structure that can reduce the differential pressure caused by the ion resin layer, the cooling water can pass smoothly, thereby maximizing the ion filtering effect, The purpose of the present invention is to provide an ion filter structure that can fundamentally solve the problem of electrical conductivity, stack current leakage, and electrical safety.

In order to achieve the above object, the present invention, the housing having an inlet port and an outlet port; A filter member in which an ion opening is filled, an inlet through which an inlet port of the housing communicates with an inlet port of the housing, and a coolant passing through the ion resin is discharged in a radial direction from a side thereof; It is configured to include, but the flow chamber in communication with the outlet port of the housing is formed around the side of the filter member in the housing, the coolant is discharged radially through the outlet from the filter member outlet port in the flow chamber It provides a fuel cell vehicle cooling water ion filter, characterized in that to be discharged.

In a preferred embodiment, the filter member is inserted into the housing long and coaxially arranged in the housing, characterized in that the flow chamber is formed by forming a gap between the filter member outer surface and the inner surface of the housing in which the outlet is formed. It is done.

The filter member may further include a cylindrical filter frame having an inlet formed at one end thereof and having an outlet formed at an outer circumferential surface of the side; A mesh network installed at an inlet of the filter frame; A mesh network installed at an outlet of the filter frame; And an ion resin filled in the inner space of the filter frame.

In addition, the outlet is formed in the longitudinal direction of the filter member in the side of the filter member, characterized in that the plurality of outlets are formed side by side at a predetermined interval.

In addition, the outlet is characterized in that it is formed long only in a predetermined section of the longitudinal rear portion relative to the direction in which the coolant flows from the side of the filter member.

In addition, the other end of the filter frame is characterized in that the filter cap for opening and closing the inner space of the filter frame is detachably assembled.

The housing may include a housing body in which the inlet port is formed and the filter member is inserted, and a housing cap in which the outlet port is formed and sealing the housing body, wherein the housing cap is detachably assembled to the housing body. It features.

In addition, the inner surface of the housing cap is formed with a plurality of protrusions for fixing and supporting the filter member, characterized in that the cooling water passages for communicating the flow chamber and the outlet port is formed between the protrusions.

Accordingly, according to the cooling water ion filter according to the present invention, by reducing the filter member filled with the ion resin to the radiation discharge type in which the cooling water is discharged in the radial direction in order to reduce the differential pressure generation, the ion resin layer section through which the cooling water passes (differential pressure section H), the length of the cooling water passage path can be reduced, and thus the cooling water flow can be smoothed and the ion filtering effect can be maximized.

In addition, as the ion filtering effect can be maximized, the electrical conductivity does not drop quickly, so that the leakage current of the stack current can be solved, and the driver's electrical safety is improved.

In particular, when the positive pressure of the initial start-up coolant pump is low, that is, when the supply flow rate of the coolant is low, the generation of the differential pressure can be greatly reduced as compared with the conventional ion filter, and the electrical safety at the start-up can be improved.

1 is a schematic diagram illustrating a coolant loop of a fuel cell vehicle.
2 is a perspective view illustrating a conventional coolant ion filter for a fuel cell vehicle.
3 is a longitudinal sectional view showing a conventional coolant ion filter for a fuel cell vehicle.
4 is a view showing a differential pressure section in a conventional fuel cell vehicle coolant ion filter.
5 is a graph showing an increase in the differential pressure according to the increase in the cooling water flow rate in the conventional ion filter.
6 is an exploded perspective view of an ion filter according to an embodiment of the present invention.
7 is a longitudinal sectional view of an ion filter according to an embodiment of the present invention.
8 is a graph showing the pressure difference between the ion filter of the present invention and a conventional ion filter.
9 is a view showing the effect of reducing the electrical conductivity when using the ion filter and the conventional ion filter of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

6 is an exploded perspective view of an ion filter according to an embodiment of the present invention, and FIG. 7 is a longitudinal sectional view of the ion filter according to the embodiment of the present invention. In FIG. 6, the illustration of the ion resin is omitted.

8 is a graph showing a comparison of the pressure difference between the ion filter and the conventional ion filter according to an embodiment of the present invention, Figure 9 is a graph showing the effect of reducing the electrical conductivity in the ion filter according to an embodiment of the present invention.

The present invention relates to an ion filter for removing ions from the coolant of the fuel cell stack, and in particular, to reduce the occurrence of the differential pressure, by improving the filter member filled with the ion resin into a radial discharge type in which the coolant is discharged in the radial direction, the coolant passes. The main characteristic is that the length of the ion resin layer section (which is the differential pressure section) is reduced (the length of the cooling water passage path).

First, the ion filter 100 according to the present invention includes a housing 110 having an inlet port 120 through which the coolant flows into the internal space and an outlet port 130 through which the coolant is discharged, and the housing ( It is configured to include an ion removal filter member 140 is mounted in the interior space of 110 and the ion resin 147 is filled in the internal space in communication with the inlet port 120 of the housing 110.

In this case, a flow chamber 102 communicating with the outlet port 130 is formed around the outer periphery of the filter member 140 in the inner space of the housing 110, and the flow chamber 102 is formed of the filter member 140. It is formed by the gap existing between the outer surface (outer peripheral surface) and the inner surface of the housing 110.

In this structure, the coolant introduced through the inlet port 120 passes through the filter member 140 and is filtered by the ion resin 147 inside the filter member and then passes through the flow chamber 102 to the outlet port 130. Through the final discharge, the flow chamber 102 is passed through the cooling water in the state ions are removed.

In a preferred embodiment, the housing 110 is to form an inner space through which the filter member 140 is inserted and the filtered coolant passes, and may be composed of the housing body 111 and the housing cap 112, the filter The housing cap 112 may be configured to be detachably assembled to the housing body 111 for easy replacement of the member 140.

For example, the housing cap 112 is a component for sealing or opening the inner space of the housing main body 111 and may be fixed to the flange formed at the upper end of the housing main body 111 by fastening means such as a screw.

At this time, the filter member 140 is inserted into the housing main body 111 in a state where the housing cap 112 is removed and opened, and then the housing cap 112 is closed, and then the housing main body 111 and the housing cap with screws or the like. Fasten the 112 to each other.

Reference numeral 111a denotes a screw coupling hole formed in the flange of the housing main body 111, and reference numeral 112a denotes a screw coupling hole formed in the corresponding position of the housing cap 112.

One end portion (lower portion in the drawing) of the housing body 111 is integrally formed with an inlet port 120 through which the coolant flows, and a housing cap assembled to the other end portion (upper portion in the drawing) of the housing body 111 ( The outlet port 130 is integrally formed at the central portion of the 112.

The inlet port 120 is formed in the center of one end of the housing body 111 to communicate with the internal space of the filter member 140 inserted into the housing body, the coolant flowing through the inlet port 120 filter member After flowing into the internal space of 140, the ion resin 147 may be passed through.

On the other hand, in the present invention, the filter member 140 is disposed long along the longitudinal direction coaxially with the housing in the center of the housing 110, the cylindrical filter frame 141 is provided with an inlet 142 and the outlet 143. ), A mesh network 144b installed at the inlet 142 of the filter frame 141, a mesh network 145 installed at the outlet 143 of the filter frame 141, and the filter frame 141. An ion resin 147 filled in the inner space of the main body has a main configuration.

Here, preferably, the other end of the filter frame 141, that is, detachably assembled for easy replacement of the ion resin 147 while sealing the inner space of the filter frame 141 on the opposite side of the inlet 142. Filter cap 146 may be installed. Assembly method of the filter cap 146 may be a screwing method as illustrated.

In addition, the inlet 142 of the filter frame 141 is formed in a structure protruding from the center of one end of the filter frame, the cylindrical coupling portion 113 protruding in communication with the inlet port 120 inside the housing body 111. Inserted and joined).

In this case, a mesh network 144b is installed at the inlet 142 of the filter frame 141 to block the ion resin 147 charged inside the filter frame from leaking while passing the cooling water.

The mesh network 144b is installed inside the inlet 142 to block the ion resin while passing the cooling water. The mesh network 144b may be supported and installed on the supports 144a and 144c installed inside the inlet. The support members 144a and 144c may be installed inside and outside the mesh net 144b so as to be supported in the interposed state.

The supports 144a and 144c have a structure in which a plurality of holes are formed to pass the cooling water, and in the case of the outer support 144c, the supports 144a and 144c are fixed to the inlet 142 by a fitting method or a screwing method.

In addition, the inner support 144a is preferably supported by the O-ring 114 between the seating end 142a protruding from the inner circumference of the inlet 142.

In addition, when inserting the inlet 142 of the filter frame 141 into the coupling portion 113 of the housing body 111, the O-ring 114 between the outer peripheral surface of the inlet of the filter frame and the inner peripheral surface of the coupling portion of the housing body 111. It is preferable to interpose.

As a result, the inlet 142 of the filter member 140 is inserted into and coupled to the coupling part 113 of the housing 110 so that the coolant introduced through the inlet port 120 of the housing passes through the mesh network 144b. After passing through the filter member, the coolant may be filtered while passing through the ion resin 147 inside the filter member and then discharged into the flow chamber 102 through the outlet 143 of the filter member.

In addition, the outlet 143 of the filter member 140 is formed long along the longitudinal direction (longitudinal direction) on the side surface, that is, the outer circumferential surface of the filter frame 141, and a plurality of outlets are installed at regular intervals along the circumferential direction of the filter frame. . At this time, the plurality of outlets 143 is a structure arranged side by side along the longitudinal direction of the filter member 140.

In addition, the outlet 143 is a direction in which the coolant flows on the outer circumference of the filter frame 141 (on the side of the filter member) so that the filtering section in the ion resin layer from which the coolant is removed is secured (upward from the lower side). It is formed long only in a predetermined section in the longitudinal rear portion (upper portion on the drawing) of the filter frame on the basis of the (flow into). For example, it may be formed to have a length of about 1/2 of the total length to the rear of the filter frame.

If the outlet 143 is formed in the longitudinal front side portion (lower portion in the drawing) of the filter frame 141, the coolant does not pass through the sufficient ion resin layer section and falls into the flow chamber 102 without being sufficiently filtered. I can go out.

In addition, the mesh frame 145 is installed inside the outlet 143 in the filter frame 141 to block the ion resin while passing the coolant, which is inside the filter member 140, more specifically inside the filter frame 141. The ion resin 147 is supported to maintain the charged state, and serves to trap the ion resin inside the filter frame.

The outlet 143 serves as a passage for discharging the filtered cooling water passing through the ion resin 147 to the flow chamber 102 formed around the filter member 140, on the outer circumference of the filter frame 141. When the outlet 143 is formed has the following advantages.

First, the outlet 143 is formed on the side of the filter member 140, that is, on the outer circumferential surface of the filter frame 141, so that the coolant flowing through the inlet port 120 of the housing 110 passes through the ion resin layer and then flows into the flow chamber. When discharged to 102, it is discharged radially.

At this time, since the outlet 143 is formed long along the longitudinal direction to the rear side (upper side in the drawing) of approximately 1/2 point of the entire length of the filter member 140, in the ion filter 100 of the present invention, one end of the housing Compared with the conventional ion filter which passes from the (inlet port) to the other end (outlet port) of the ion resin layer in the longitudinal direction of the ion resin layer, the outlet of the filter member 140 at the inlet port 120 of the housing 110 143) through the shorter path of the ion resin layer.

As described above, the ion filter 100 of the present invention has a radiation discharge type in which cooling water is discharged from one end of the filter member 140 to the side of the filter member, whereby a path of the cooling water passing through the ion resin layer becomes shorter. This in turn improves the occurrence of pressure drop, ie differential pressure.

Meanwhile, in order for the coolant to be discharged radially from the filter member 140 to pass through the flow chamber 102 and to be discharged through the outlet port 130 of the housing 110, the flow chamber must communicate with the outlet port 130. .

Accordingly, a plurality of protrusions 115 supporting the filter member 140 are formed on the inner surface of the housing cap 112, and the cooling water passes through the protrusions 115 and spaced apart from the protrusions 115.

The protrusion 115 contacts the outer surface (upper side in the drawing) of the filter cap 146 to support the filter member 140, and the cooling water between the spaced protrusions 115 leading to the outlet port 130. As the passage is formed, the coolant in the flow chamber 102 may pass between the protrusions 115 and be finally discharged through the outlet port 130.

In this way, the ion filter of the present invention is characterized in that the filter member filled with the ion resin is improved to a radiation discharge type in which the cooling water is discharged in the radial direction, and the length of the ion resin layer section (differential pressure section) through which the cooling water passes ( Since the length of the coolant passage path is reduced at a level that does not affect the filtering performance, the internal pressure difference (coolant pressure drop) can be reduced and the coolant can pass smoothly.

Compared with the conventional ion filter, the ion resin layer section in which the differential pressure is generated, that is, the length of the differential pressure section is greatly reduced, thereby greatly reducing the pressure drop of the cooling water. Referring to FIG. 8, in particular, in a state in which the positive pressure of the cooling water pump is low That is, when the supply flow rate of the cooling water is small, it can be seen that the generation of the differential pressure is significantly reduced in the ion filter of the present invention compared to the conventional ion filter.

In addition, it can be seen that the occurrence of the differential pressure is greatly reduced, so that the flow rate can be significantly increased in the case of the present invention at the same differential pressure reference.

In the result of FIG. 8, the pressure drop was 78% improvement (100 kPa @ 8LPM → 22kPa @ 8LPM) compared to the conventional ion filter, and the maximum flow rate through the ion filter of the present invention was increased by 2.5 times due to the significant decrease in the pressure drop. 10LPM → 25LPM).

In addition, as the present invention improves the structure of the filter member to the radiation discharge type to significantly reduce the differential pressure, the flow of the coolant smoothly flows into the ion filter, which increases the filtering efficiency so that it is possible to quickly reduce the electrical conductivity of the coolant. In addition, it is possible to improve the conventional problem that the initial velocity of the starting electric conductivity is low.

In particular, since the coolant pump is operated at a low speed (e.g., 1500 rpm) compared to the rotational speed (e.g., 3500 rpm) at the time of high power operation, the positive pressure of the coolant pump is low in the low speed section at the start of the start, and thus, the differential pressure is large. Although the coolant does not flow smoothly through the ion filter, in the ion filter of the present invention, the coolant can flow more smoothly under the same pump conditions at the start of the pump due to the differential pressure improving effect, and the driver's electrical safety is sufficiently secured at the start of the start with a small amount of coolant supply flow. You can do it.

9 is a view showing the effect of reducing the electrical conductivity at the beginning of the start when using the ion filter and the conventional ion filter of the present invention, the initial electrical conductivity 120μS / by applying the same ion resin, the same pump pressure, the same facility water It shows the result of measuring the time from cm to the final electrical conductivity of less than 1 μS / cm.

As shown in FIG. 9, it can be seen that the ion filter according to the present invention improves the electrical conductivity reduction effect as well as the differential pressure improving effect, and the time taken to reach the electrical conductivity of less than 1 μS / cm at the initial stage of startup is the conventional ion. It can be seen that significantly shorter than the filter.

After parking the vehicle for a certain period of time, such as on weekends, ion dissociation occurs in all the components that make up the coolant loop, increasing the electrical conductivity of the coolant (for example, 0.5 to 2 μS / cm → 5 to 8 μS / cm). In the results of FIG. 9, the time to start up to a normal value (less than 2 μS / cm) at start-up was improved by 22% (reduced from 539 seconds to 420 seconds).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Modified forms are also included within the scope of the present invention.

100: ion filter 102: flow chamber
110: housing 111: housing body
112: housing cap 115: protrusion
120: inlet port 130: outlet port
140: filter member 141: filter frame
142: inlet 143: outlet
144b: mesh network 145: mesh network
146: filter cap 147: ion resin

Claims (8)

A housing (110) having an inlet port (120) and an outlet port (130);
An ion resin 147 is filled, and an inlet 142 through which the cooling water flows is formed at one end of the inlet port 120 of the housing 110, and the cooling water passing through the ion resin 147 is formed on the side surface thereof. A filter member 140 having a discharge port 143 formed on the side surface to be discharged in a radial direction from the filter member 140;
It is configured to include, in the housing 110 around the side of the filter member 140 is formed in the flow chamber 102 in communication with the outlet port 130 of the housing 110, the coolant is the filter Cooling water ion filter for a fuel cell vehicle, characterized in that discharged radially through the outlet 143 from the member 140 and then discharged from the flow chamber 102 to the outlet port 130.
The method according to claim 1,
The filter member 140 is inserted into and disposed coaxially with the housing in the housing 110 and is disposed in the flow chamber by forming a gap between the filter member outer surface on which the outlet 143 is formed and the inner surface of the housing. Cooling water ion filter for a fuel cell vehicle, characterized in that the 102 is formed.
The method according to claim 1,
The filter member 140,
A cylindrical filter frame 141 having an inlet 142 formed at one end thereof, and having an outlet 143 formed at an outer circumferential surface of the side surface thereof;
A mesh network 144b installed at the inlet 142 of the filter frame 141;
A mesh network 145 installed at the outlet 143 of the filter frame 141;
An ion resin 147 filled in the inner space of the filter frame 141;
Cooling water ion filter for a fuel cell vehicle, characterized in that comprises a.
The method according to any one of claims 1 to 3,
The outlet 143 is formed along the lengthwise direction of the filter member at the side of the filter member 140, a plurality of outlets 143 are formed side by side at a predetermined interval coolant ion filter for a fuel cell vehicle.
The method of claim 4,
The outlet 143 is a fuel cell vehicle coolant ion filter, characterized in that formed long in the predetermined region in the longitudinal rear portion relative to the direction in which the coolant flows from the side of the filter member (140).
The method according to claim 3,
Cooling water ion filter for a fuel cell vehicle, characterized in that the other end of the filter frame 143 is detachably assembled filter cap (146) for opening and closing the inner space of the filter frame.
The method according to claim 1,
The housing 110 includes a housing cap 111 in which the inlet port 120 is formed and the filter member 140 is inserted therein, and the outlet port 130 is formed and seals the housing body 111. Cooling water ion filter for a fuel cell vehicle, characterized in that the (112), the housing cap 112 is assembled detachably to the housing body (111).
The method according to claim 7,
A plurality of protrusions 115 for fixing and supporting the filter member 140 are formed on an inner side surface of the housing cap 112, and the flow chamber 102 and the outlet port 130 communicate between the protrusions 115. Cooling water ion filter for a fuel cell vehicle, characterized in that the cooling water passage is formed.

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